Cheapest priced copy (World Championship Decks 1999): $37.99 at Card Kingdom, near mint, out of stock, their price list as of .
Powder Keg 
Artifact · Rare · Urza's Destiny · #136
At the beginning of your upkeep, you may put a fuse counter on this artifact.
{T}, Sacrifice this artifact: Destroy each artifact and creature with mana value equal to the number of fuse counters on this artifact.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $37.99 to $449.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Magic Player Rewards 2004 | 1 | Rare | — | $59.99 |
| Urza's Destiny | 136 | Rare | $74.99 | $449.99 |
| World Championship Decks 1999 | js136a | Rare | $37.99Out of stock | — |
2 rulings from Wizards of the Coast
- 4 October 2004Putting on a counter is optional. If you forget, you can’t go back later even if it is something you usually do.
- 4 October 2004Only destroys artifacts and creatures with exactly the specified cost. It does not mean “less than or equal to”.